Guide by Geneva-based NGO Interpeace summarizes decades of best practices.
Around 50 demonstrators gathered in front of Phnom Penh municipal court Wednesday morning, where they stayed all day.
Police officials have said they want to question Mam Sonando in relation to the alleged movement in Kratie province.
City officials could not be reached for comment, but rights workers said they expect the 13 detainees will appear in court Wednesday.
Authorities say they want to arrest Bun Ratha for participating in an anti-government movement, alongside other suspects in Kratie.
Two demonstrations—one of factory workers and one of displaced city residents—were held on Monday.
Security forces have left a village in Kratie that was the site of the shooting death of a teenage girl by government forces last week.
The ultimate goal is to have libraries in all of Cambodia’s 26 prisons by 2014, serving more than 15,000 prisoners nationwide.
The delegation also met with UN officials in New York last week and were scheduled to talk with the US State Department Friday.
Those arrested were Khat Sovann, 54, Pum Vannak, 53, Pon Soeurn, 34, and an unnamed fourth suspect.
Rights workers estimated between 400 and 1,000 villagers in Broma village, Chlong district, were set to be evicted.
At least 10 parties have registered for elections, which will be held across 1,633 communes next month.